Morton yam bean –see-Pachyrhizus erosus (L.) Urb. yangjinhua –see-Datura metel L. yarloop clover –see-Trifolium subterraneum L. yarrow –see-Achillea millefolium L. yasmin –see-Jasminum officinale L. yautia –see-Xanthosoma sagittifolium (L.) Schott ye huai –see-Sophora flavescens Aiton ye-huai-geng –see-Sophora flavescens Aiton yeara –see-Toxicodendron diversilobum (Torr. & A. Gray)

Greene; Toxicodendron pubescens Mill. yedra –see-Toxicodendron diversilobum (Torr. & A. Gray)

Greene yee tho –see-Nerium oleander L. yellow allamanda –see-Allamanda cathartica L. yellow bean –see-Thermopsis montana Nutt. yellow bird-of-paradise –see-Caesalpinia gilliesii (Hook.) D.